- 1. We haven't found any convincing evidence that selectivity or prestige matters.
- 我们还没有找到任何有说服力的证据来证明选择性或声望很重要。
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- 2. Schools are tending towards greater selectivity.
- 学校对新生的选拔有趋严之势。
《牛津词典》
- 3. Selectivity is key to its success.
- 选择性是成功关键。
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- 4. Step 2.5: Verify the selectivity estimates
- 步骤 2.5：验证选择性估计
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- 5. The selectivity of a predicate is defined as.
- 谓词的选择性定义如下。
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- 6. The first bucket of gold can make her life full of selectivity.
- 这第一桶金，让生活的可选择性丰富极了。
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- 7. Histograms are used to calculate the selectivity of the predicates.
- 直方图用于计算谓词的选择率。
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- 8. This suggests a much better predicate selectivity than it appears to be!
- 这表明谓词选择性比其表现出来的还要好！
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- 9. The Listing 7 output is starting to look useful, but suffers from a lack of selectivity.
- 清单7的输出看起来有用一些了，但是缺少选择性。
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- 10. Our ears have only evolved to respond to sound with very high sensitivity and high selectivity.
- 人类的耳朵对声音的反应，极为敏感，也极有选择性。
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- 11. In other words, the optimizer overestimated the selectivity of the local predicates on the table.
- 换句话说，优化器过高估计了本地谓词对表格的选择性。
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- 12. The optimizer can use data distributions to calculate selectivity for the filters in a query.
- 优化器可以使用数据分布来计算查询中过滤器的选择率。
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- 13. Given accurate statistics, the query optimizer generally comes up with correct selectivity estimates.
- 如果有了准确的统计信息，那么查询优化器一般能够得出正确的选择性估计。
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- 14. YUSHAN YAN: "in terms of sensitivity and selectivity, the current technology out there is still inferior."
- 严教授：“在灵敏度和选择性方面，目前的技术仍存在劣势。”
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- 15. Now that you've analyzed the selectivity of the local predicates, let's now look at the table selectivity.
- 已经分析了本地谓词的选择性，我们再看看表的选择性。
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- 16. So it is obvious that the accuracy of selectivity estimation depends upon how often you run UPDATE STATISTICS.
- 因此，选择性估算的准确性显然基于您运行UPDATESTATISTICS的频率。
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- 17. The use of column groups provides more accurate estimates of the joint selectivity of multiple predicates.
- 列组的使用将给多个谓词的联合选择提供更准确的估计。
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- 18. But the selectivity calculated in this way is not as accurate as selectivity calculated using data distribution.
- 但是，使用该方式计算的选择性不如使用数据分布计算的选择性准确。
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- 19. Let me count the ways: First, graduation rates rise with college selectivity, even among equally qualified students.
- 让我们盘点一下这些方法：首先，名牌大学的毕业率随着学校的知名度而逐次升高。
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- 20. Each join reduces the size of the fact table by one-tenth due to selectivity of the table filter on each dimension table.
- 由于每个维度表过滤的选择度，每次连接都会减少事实表大小的十分之一。
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- 21. The selectivity is a value between 0 and 1 that indicates the percentage of rows within the table that the filter can pass.
- 选择率是介于 0 到1 之间的一个值，表示表中能通过过滤器的行所占的百分比。
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- 22. On its own, that's pretty powerful; but XPath offers quite a bit more in terms of selectivity, all using what's called a predicate.
- 这本身已经非常强大了，不过XPath 还提供了更多的选择性，即使用所谓的谓词。
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- 23. The optimizer USES data distribution information generated by UPDATE STATISTICS to calculate selectivity for the filters in the query.
- 优化器使用UPDATESTATISTICS所生成的数据分布信息来计算查询中筛选器的选择性。
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- 24. At the same time, we also have found differences in signal selectivity that may allow us to target some bacteria while ignoring others.
- 同时，我们还发现了信号选择性的差异，这能够使我们针对一些特定的细菌而不影响到其他。
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- 25. The performance improvement depends on the selectivity of the filter on the dimension table from which the join keys are pushed down.
- 性能的提高取决于连接键被下推时所在维度表的过滤选择度。
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- 26. The optimizer can then compare the input variable values to catalog statistics and compute a better selectivity estimate for predicates.
- 然后，优化器可以将输入变量的值与编目统计进行比较，并为谓词计算出一个更好的选择估计。
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- 27. However, in the absence of data distributions, the database server calculates selectivity for filters of different types based on table indexes.
- 但是，如果没有数据分布，则数据库服务器根据表索引计算不同类型的过滤器的选择率。
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- 28. And each node is annotated by statistics, estimated costs, selectivity information and so forth that are used to determine the access plan flow.
- 每个节点都有统计数据、评估成本、选择信息等用来确定访问计划流的注释。
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- 29. And each node is annotated by statistics, estimated costs, selectivity information and so forth that are used to determine the access plan flow.
- 每个节点都有统计数据、评估成本、选择信息等用来确定访问计划流的注释。
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